Thank you very much Kremella for your answer.
\nNo. It happens when I start calculation.
\nThis is the UDF exactly the same as the one in ANSYS help. The UDF is as below. I have realized that the problem is with the functions ( C_D(cell, tm) ,C_VOF(cell, thread), and C_R(cell, thread)) as I have tried constant values instead of them and it worked. Do you have any idea why this happens?
\n#include “udf.h”
\n#include “sg_pb.h”
\n#include “sg_mphase.h”<\/p>\n
DEFINE_PB_BREAK_UP_RATE_FREQ(break_up_freq_tav, cell, thread, d_1)
\n{
\n\treal epsi, alpha, f1, f2, rho_d;
\n\treal C1 = 0.00481, C2 = 0.08, sigma = 0.07;
\n\tThread *tm = THREAD_SUPER_THREAD(thread);\/*passed thread is phase*\/
\n\tepsi = C_D(cell, tm);
\n\talpha = C_VOF(cell, thread);
\n\trho_d = C_R(cell, thread);
\n\tf1 = pow(epsi, 1. \/ 3.) \/ ((1. + epsi)*pow(d_1, 2. \/ 3.));
\n\tf2 = -(C2*sigma*(1. + alpha)*(1. + alpha)) \/ (rho_d*pow(epsi, 2. \/ 3.)*pow(d_1, 5. \/ 3.));
\n\treturn C1 * f1*exp(f2);
\n}<\/p>\n","protected":false},"template":"","class_list":["post-194600","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t